Refs #34074 -- Used headers argument for RequestFactory and Client in docs and tests.

docs/topics/testing/advanced.txt

@@ -152,7 +152,10 @@ example, the test suite for docs.djangoproject.com includes the following::
 
     class SearchFormTestCase(TestCase):
         def test_empty_get(self):
-            response = self.client.get('/en/dev/search/', HTTP_HOST='docs.djangoproject.dev:8000')
+            response = self.client.get(
+                "/en/dev/search/",
+                headers={"host": "docs.djangoproject.dev:8000"},
+            )
             self.assertEqual(response.status_code, 200)
 
 and the settings file includes a list of the domains supported by the project::

docs/topics/testing/tools.txt

@@ -682,7 +682,7 @@ a name of :setting:`LANGUAGE_COOKIE_NAME` and a value of the language code::
 or by including the ``Accept-Language`` HTTP header in the request::
 
     def test_language_using_header(self):
-        response = self.client.get('/', HTTP_ACCEPT_LANGUAGE='fr')
+        response = self.client.get("/", headers={"accept-language": "fr"})
         self.assertEqual(response.content, b"Bienvenue sur mon site.")
 
 More details are in :ref:`how-django-discovers-language-preference`.

tests/auth_tests/test_views.py

@@ -214,7 +214,7 @@ class PasswordResetTest(AuthViewsTestCase):
             response = self.client.post(
                 "/password_reset/",
                 {"email": "staffmember@example.com"},
-                HTTP_HOST="www.example:dr.frankenstein@evil.tld",
+                headers={"host": "www.example:dr.frankenstein@evil.tld"},
             )
         self.assertEqual(response.status_code, 400)
         self.assertEqual(len(mail.outbox), 0)
@@ -227,7 +227,7 @@ class PasswordResetTest(AuthViewsTestCase):
             response = self.client.post(
                 "/admin_password_reset/",
                 {"email": "staffmember@example.com"},
-                HTTP_HOST="www.example:dr.frankenstein@evil.tld",
+                headers={"host": "www.example:dr.frankenstein@evil.tld"},
             )
         self.assertEqual(response.status_code, 400)
         self.assertEqual(len(mail.outbox), 0)

tests/cache/tests.py

@@ -2004,7 +2004,7 @@ class CacheUtils(SimpleTestCase):
 
     host = "www.example.com"
     path = "/cache/test/"
-    factory = RequestFactory(HTTP_HOST=host)
+    factory = RequestFactory(headers={"host": host})
 
     def tearDown(self):
         cache.clear()
@@ -2095,9 +2095,9 @@ class CacheUtils(SimpleTestCase):
         """
         get_cache_key keys differ by fully-qualified URL instead of path
         """
-        request1 = self.factory.get(self.path, HTTP_HOST="sub-1.example.com")
+        request1 = self.factory.get(self.path, headers={"host": "sub-1.example.com"})
         learn_cache_key(request1, HttpResponse())
-        request2 = self.factory.get(self.path, HTTP_HOST="sub-2.example.com")
+        request2 = self.factory.get(self.path, headers={"host": "sub-2.example.com"})
         learn_cache_key(request2, HttpResponse())
         self.assertNotEqual(get_cache_key(request1), get_cache_key(request2))
 

tests/i18n/patterns/tests.py

@@ -252,29 +252,39 @@ class URLRedirectTests(URLTestCaseBase):
         self.assertEqual(response.status_code, 200)
 
     def test_en_redirect(self):
-        response = self.client.get("/account/register/", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get(
+            "/account/register/", headers={"accept-language": "en"}
+        )
         self.assertRedirects(response, "/en/account/register/")
 
         response = self.client.get(response.headers["location"])
         self.assertEqual(response.status_code, 200)
 
     def test_en_redirect_wrong_url(self):
-        response = self.client.get("/profiel/registreren/", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get(
+            "/profiel/registreren/", headers={"accept-language": "en"}
+        )
         self.assertEqual(response.status_code, 404)
 
     def test_nl_redirect(self):
-        response = self.client.get("/profiel/registreren/", HTTP_ACCEPT_LANGUAGE="nl")
+        response = self.client.get(
+            "/profiel/registreren/", headers={"accept-language": "nl"}
+        )
         self.assertRedirects(response, "/nl/profiel/registreren/")
 
         response = self.client.get(response.headers["location"])
         self.assertEqual(response.status_code, 200)
 
     def test_nl_redirect_wrong_url(self):
-        response = self.client.get("/account/register/", HTTP_ACCEPT_LANGUAGE="nl")
+        response = self.client.get(
+            "/account/register/", headers={"accept-language": "nl"}
+        )
         self.assertEqual(response.status_code, 404)
 
     def test_pt_br_redirect(self):
-        response = self.client.get("/conta/registre-se/", HTTP_ACCEPT_LANGUAGE="pt-br")
+        response = self.client.get(
+            "/conta/registre-se/", headers={"accept-language": "pt-br"}
+        )
         self.assertRedirects(response, "/pt-br/conta/registre-se/")
 
         response = self.client.get(response.headers["location"])
@@ -282,7 +292,9 @@ class URLRedirectTests(URLTestCaseBase):
 
     def test_pl_pl_redirect(self):
         # language from outside of the supported LANGUAGES list
-        response = self.client.get("/account/register/", HTTP_ACCEPT_LANGUAGE="pl-pl")
+        response = self.client.get(
+            "/account/register/", headers={"accept-language": "pl-pl"}
+        )
         self.assertRedirects(response, "/en/account/register/")
 
         response = self.client.get(response.headers["location"])
@@ -295,7 +307,9 @@ class URLRedirectTests(URLTestCaseBase):
         ],
     )
     def test_custom_redirect_class(self):
-        response = self.client.get("/account/register/", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get(
+            "/account/register/", headers={"accept-language": "en"}
+        )
         self.assertRedirects(response, "/en/account/register/", 301)
 
 
@@ -314,7 +328,9 @@ class URLVaryAcceptLanguageTests(URLTestCaseBase):
         The redirect to a prefixed URL depends on 'Accept-Language' and
         'Cookie', but once prefixed no header is set.
         """
-        response = self.client.get("/account/register/", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get(
+            "/account/register/", headers={"accept-language": "en"}
+        )
         self.assertRedirects(response, "/en/account/register/")
         self.assertEqual(response.get("Vary"), "Accept-Language, Cookie")
 
@@ -330,19 +346,19 @@ class URLRedirectWithoutTrailingSlashTests(URLTestCaseBase):
     """
 
     def test_not_prefixed_redirect(self):
-        response = self.client.get("/not-prefixed", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get("/not-prefixed", headers={"accept-language": "en"})
         self.assertRedirects(response, "/not-prefixed/", 301)
 
     def test_en_redirect(self):
         response = self.client.get(
-            "/account/register", HTTP_ACCEPT_LANGUAGE="en", follow=True
+            "/account/register", headers={"accept-language": "en"}, follow=True
         )
         # We only want one redirect, bypassing CommonMiddleware
         self.assertEqual(response.redirect_chain, [("/en/account/register/", 302)])
         self.assertRedirects(response, "/en/account/register/", 302)
 
         response = self.client.get(
-            "/prefixed.xml", HTTP_ACCEPT_LANGUAGE="en", follow=True
+            "/prefixed.xml", headers={"accept-language": "en"}, follow=True
         )
         self.assertRedirects(response, "/en/prefixed.xml", 302)
 
@@ -355,13 +371,13 @@ class URLRedirectWithoutTrailingSlashSettingTests(URLTestCaseBase):
 
     @override_settings(APPEND_SLASH=False)
     def test_not_prefixed_redirect(self):
-        response = self.client.get("/not-prefixed", HTTP_ACCEPT_LANGUAGE="en")
+        response = self.client.get("/not-prefixed", headers={"accept-language": "en"})
         self.assertEqual(response.status_code, 404)
 
     @override_settings(APPEND_SLASH=False)
     def test_en_redirect(self):
         response = self.client.get(
-            "/account/register-without-slash", HTTP_ACCEPT_LANGUAGE="en"
+            "/account/register-without-slash", headers={"accept-language": "en"}
         )
         self.assertRedirects(response, "/en/account/register-without-slash", 302)
 
@@ -424,7 +440,7 @@ class URLRedirectWithScriptAliasTests(URLTestCaseBase):
         prefix = "/script_prefix"
         with override_script_prefix(prefix):
             response = self.client.get(
-                "/prefixed/", HTTP_ACCEPT_LANGUAGE="en", SCRIPT_NAME=prefix
+                "/prefixed/", headers={"accept-language": "en"}, SCRIPT_NAME=prefix
             )
             self.assertRedirects(
                 response, "%s/en/prefixed/" % prefix, target_status_code=404

tests/i18n/tests.py

@@ -1778,7 +1778,7 @@ class MiscTests(SimpleTestCase):
         ]
         for header, expected in tests:
             with self.subTest(header=header):
-                request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE=header)
+                request = self.rf.get("/", headers={"accept-language": header})
                 self.assertEqual(get_language_from_request(request), expected)
 
     @override_settings(
@@ -1799,10 +1799,10 @@ class MiscTests(SimpleTestCase):
         refs #18419 -- this is explicitly for browser compatibility
         """
         g = get_language_from_request
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="zh-cn,en")
+        request = self.rf.get("/", headers={"accept-language": "zh-cn,en"})
         self.assertEqual(g(request), "zh-hans")
 
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="zh-tw,en")
+        request = self.rf.get("/", headers={"accept-language": "zh-tw,en"})
         self.assertEqual(g(request), "zh-hant")
 
     def test_special_fallback_language(self):
@@ -1810,7 +1810,7 @@ class MiscTests(SimpleTestCase):
         Some languages may have special fallbacks that don't follow the simple
         'fr-ca' -> 'fr' logic (notably Chinese codes).
         """
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="zh-my,en")
+        request = self.rf.get("/", headers={"accept-language": "zh-my,en"})
         self.assertEqual(get_language_from_request(request), "zh-hans")
 
     def test_subsequent_code_fallback_language(self):
@@ -1828,7 +1828,7 @@ class MiscTests(SimpleTestCase):
         ]
         for value, expected in tests:
             with self.subTest(value=value):
-                request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE=f"{value},en")
+                request = self.rf.get("/", headers={"accept-language": f"{value},en"})
                 self.assertEqual(get_language_from_request(request), expected)
 
     def test_parse_language_cookie(self):
@@ -1840,7 +1840,7 @@ class MiscTests(SimpleTestCase):
         request.COOKIES[settings.LANGUAGE_COOKIE_NAME] = "pt"
         self.assertEqual("pt", g(request))
 
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="de")
+        request = self.rf.get("/", headers={"accept-language": "de"})
         request.COOKIES[settings.LANGUAGE_COOKIE_NAME] = "es"
         self.assertEqual("es", g(request))
 
@@ -1854,7 +1854,7 @@ class MiscTests(SimpleTestCase):
         # translation to variation (zh-hans) the user sets zh-hans as the
         # preferred language, it should be selected without falling back nor
         # ignoring it.
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="de")
+        request = self.rf.get("/", headers={"accept-language": "de"})
         request.COOKIES[settings.LANGUAGE_COOKIE_NAME] = "zh-hans"
         self.assertEqual(g(request), "zh-hans")
 
@@ -1957,7 +1957,7 @@ class MiscTests(SimpleTestCase):
         previously valid should not be used (#14170).
         """
         g = get_language_from_request
-        request = self.rf.get("/", HTTP_ACCEPT_LANGUAGE="pt-br")
+        request = self.rf.get("/", headers={"accept-language": "pt-br"})
         self.assertEqual("pt-br", g(request))
         with self.settings(LANGUAGES=[("en", "English")]):
             self.assertNotEqual("pt-br", g(request))
@@ -2215,13 +2215,13 @@ class CountrySpecificLanguageTests(SimpleTestCase):
     def test_get_language_from_request(self):
         # issue 19919
         request = self.rf.get(
-            "/", HTTP_ACCEPT_LANGUAGE="en-US,en;q=0.8,bg;q=0.6,ru;q=0.4"
+            "/", headers={"accept-language": "en-US,en;q=0.8,bg;q=0.6,ru;q=0.4"}
         )
         lang = get_language_from_request(request)
         self.assertEqual("en-us", lang)
 
         request = self.rf.get(
-            "/", HTTP_ACCEPT_LANGUAGE="bg-bg,en-US;q=0.8,en;q=0.6,ru;q=0.4"
+            "/", headers={"accept-language": "bg-bg,en-US;q=0.8,en;q=0.6,ru;q=0.4"}
         )
         lang = get_language_from_request(request)
         self.assertEqual("bg", lang)
@@ -2233,13 +2233,13 @@ class CountrySpecificLanguageTests(SimpleTestCase):
     def test_specific_language_codes(self):
         # issue 11915
         request = self.rf.get(
-            "/", HTTP_ACCEPT_LANGUAGE="pt,en-US;q=0.8,en;q=0.6,ru;q=0.4"
+            "/", headers={"accept-language": "pt,en-US;q=0.8,en;q=0.6,ru;q=0.4"}
         )
         lang = get_language_from_request(request)
         self.assertEqual("pt-br", lang)
 
         request = self.rf.get(
-            "/", HTTP_ACCEPT_LANGUAGE="pt-pt,en-US;q=0.8,en;q=0.6,ru;q=0.4"
+            "/", headers={"accept-language": "pt-pt,en-US;q=0.8,en;q=0.6,ru;q=0.4"}
         )
         lang = get_language_from_request(request)
         self.assertEqual("pt-br", lang)

tests/logging_tests/tests.py

@@ -419,14 +419,14 @@ class AdminEmailHandlerTest(SimpleTestCase):
         # Text email
         admin_email_handler.include_html = False
         try:
-            self.client.get("/", HTTP_HOST="evil.com")
+            self.client.get("/", headers={"host": "evil.com"})
         finally:
             admin_email_handler.include_html = old_include_html
 
         # HTML email
         admin_email_handler.include_html = True
         try:
-            self.client.get("/", HTTP_HOST="evil.com")
+            self.client.get("/", headers={"host": "evil.com"})
         finally:
             admin_email_handler.include_html = old_include_html
 

tests/middleware/tests.py

@@ -690,7 +690,7 @@ class ConditionalGetMiddlewareTest(SimpleTestCase):
 
         response = ConditionalGetMiddleware(self.get_response)(self.req)
         etag = response.headers["ETag"]
-        put_request = self.request_factory.put("/", HTTP_IF_MATCH=etag)
+        put_request = self.request_factory.put("/", headers={"if-match": etag})
         conditional_get_response = ConditionalGetMiddleware(get_200_response)(
             put_request
         )
@@ -1061,7 +1061,7 @@ class ETagGZipMiddlewareTest(SimpleTestCase):
             response.headers["ETag"] = '"eggs"'
             return response
 
-        request = self.rf.get("/", HTTP_ACCEPT_ENCODING="gzip, deflate")
+        request = self.rf.get("/", headers={"accept-encoding": "gzip, deflate"})
         gzip_response = GZipMiddleware(get_response)(request)
         self.assertEqual(gzip_response.headers["ETag"], 'W/"eggs"')
 
@@ -1075,7 +1075,7 @@ class ETagGZipMiddlewareTest(SimpleTestCase):
             response.headers["ETag"] = 'W/"eggs"'
             return response
 
-        request = self.rf.get("/", HTTP_ACCEPT_ENCODING="gzip, deflate")
+        request = self.rf.get("/", headers={"accept-encoding": "gzip, deflate"})
         gzip_response = GZipMiddleware(get_response)(request)
         self.assertEqual(gzip_response.headers["ETag"], 'W/"eggs"')
 
@@ -1090,11 +1090,12 @@ class ETagGZipMiddlewareTest(SimpleTestCase):
         def get_cond_response(req):
             return ConditionalGetMiddleware(get_response)(req)
 
-        request = self.rf.get("/", HTTP_ACCEPT_ENCODING="gzip, deflate")
+        request = self.rf.get("/", headers={"accept-encoding": "gzip, deflate"})
         response = GZipMiddleware(get_cond_response)(request)
         gzip_etag = response.headers["ETag"]
         next_request = self.rf.get(
-            "/", HTTP_ACCEPT_ENCODING="gzip, deflate", HTTP_IF_NONE_MATCH=gzip_etag
+            "/",
+            headers={"accept-encoding": "gzip, deflate", "if-none-match": gzip_etag},
         )
         next_response = ConditionalGetMiddleware(get_response)(next_request)
         self.assertEqual(next_response.status_code, 304)

tests/test_client/tests.py

@@ -1068,8 +1068,10 @@ class RequestFactoryTest(SimpleTestCase):
 
     def test_request_factory_default_headers(self):
         request = RequestFactory(
-            HTTP_AUTHORIZATION="Bearer faketoken",
+            headers={
-            HTTP_X_ANOTHER_HEADER="some other value",
+                "authorization": "Bearer faketoken",
+                "x-another-header": "some other value",
+            }
         ).get("/somewhere/")
         self.assertEqual(request.headers["authorization"], "Bearer faketoken")
         self.assertIn("HTTP_AUTHORIZATION", request.META)
@@ -1092,8 +1094,10 @@ class RequestFactoryTest(SimpleTestCase):
             method = getattr(self.request_factory, method_name)
             request = method(
                 "/somewhere/",
-                HTTP_AUTHORIZATION="Bearer faketoken",
+                headers={
-                HTTP_X_ANOTHER_HEADER="some other value",
+                    "authorization": "Bearer faketoken",
+                    "x-another-header": "some other value",
+                },
             )
             self.assertEqual(request.headers["authorization"], "Bearer faketoken")
             self.assertIn("HTTP_AUTHORIZATION", request.META)

tests/test_client_regress/tests.py

@@ -1228,14 +1228,18 @@ class UploadedFileEncodingTest(SimpleTestCase):
 class RequestHeadersTest(SimpleTestCase):
     def test_client_headers(self):
         "A test client can receive custom headers"
-        response = self.client.get("/check_headers/", HTTP_X_ARG_CHECK="Testing 123")
+        response = self.client.get(
+            "/check_headers/", headers={"x-arg-check": "Testing 123"}
+        )
         self.assertEqual(response.content, b"HTTP_X_ARG_CHECK: Testing 123")
         self.assertEqual(response.status_code, 200)
 
     def test_client_headers_redirect(self):
         "Test client headers are preserved through redirects"
         response = self.client.get(
-            "/check_headers_redirect/", follow=True, HTTP_X_ARG_CHECK="Testing 123"
+            "/check_headers_redirect/",
+            follow=True,
+            headers={"x-arg-check": "Testing 123"},
         )
         self.assertEqual(response.content, b"HTTP_X_ARG_CHECK: Testing 123")
         self.assertRedirects(

tests/view_tests/tests/test_csrf.py

@@ -41,7 +41,7 @@ class CsrfViewTests(SimpleTestCase):
         Referer header is strictly checked for POST over HTTPS. Trigger the
         exception by sending an incorrect referer.
         """
-        response = self.client.post("/", HTTP_X_FORWARDED_PROTO="https")
+        response = self.client.post("/", headers={"x-forwarded-proto": "https"})
         self.assertContains(
             response,
             "You are seeing this message because this HTTPS site requires a "

tests/view_tests/tests/test_debug.py

@@ -237,7 +237,7 @@ class DebugViewTests(SimpleTestCase):
             html=True,
         )
         with self.assertLogs("django.request", "ERROR"):
-            response = self.client.get("/raises500/", HTTP_ACCEPT="text/plain")
+            response = self.client.get("/raises500/", headers={"accept": "text/plain"})
         self.assertContains(
             response,
             "Raised during: view_tests.views.raises500",
@@ -254,7 +254,9 @@ class DebugViewTests(SimpleTestCase):
             html=True,
         )
         with self.assertLogs("django.request", "ERROR"):
-            response = self.client.get("/classbased500/", HTTP_ACCEPT="text/plain")
+            response = self.client.get(
+                "/classbased500/", headers={"accept": "text/plain"}
+            )
         self.assertContains(
             response,
             "Raised during: view_tests.views.Raises500View",
@@ -432,7 +434,7 @@ class DebugViewTests(SimpleTestCase):
         )
 
         with self.assertLogs("django.request", "ERROR"):
-            response = self.client.get("/raises500/", HTTP_ACCEPT="text/plain")
+            response = self.client.get("/raises500/", headers={"accept": "text/plain"})
         self.assertContains(response, "Oh dear, an error occurred!", status_code=500)
 
 
@@ -1116,7 +1118,7 @@ class ExceptionReporterTests(SimpleTestCase):
     @override_settings(ALLOWED_HOSTS="example.com")
     def test_disallowed_host(self):
         "An exception report can be generated even for a disallowed host."
-        request = self.rf.get("/", HTTP_HOST="evil.com")
+        request = self.rf.get("/", headers={"host": "evil.com"})
         reporter = ExceptionReporter(request, None, None, None)
         html = reporter.get_traceback_html()
         self.assertIn("http://evil.com/", html)
@@ -1201,7 +1203,7 @@ class ExceptionReporterTests(SimpleTestCase):
 
     @override_settings(ALLOWED_HOSTS=["example.com"])
     def test_get_raw_insecure_uri(self):
-        factory = RequestFactory(HTTP_HOST="evil.com")
+        factory = RequestFactory(headers={"host": "evil.com"})
         tests = [
             ("////absolute-uri", "http://evil.com//absolute-uri"),
             ("/?foo=bar", "http://evil.com/?foo=bar"),
@@ -1326,7 +1328,7 @@ class PlainTextReportTests(SimpleTestCase):
     @override_settings(ALLOWED_HOSTS="example.com")
     def test_disallowed_host(self):
         "An exception report can be generated even for a disallowed host."
-        request = self.rf.get("/", HTTP_HOST="evil.com")
+        request = self.rf.get("/", headers={"host": "evil.com"})
         reporter = ExceptionReporter(request, None, None, None)
         text = reporter.get_traceback_text()
         self.assertIn("http://evil.com/", text)
@@ -1787,7 +1789,7 @@ class ExceptionReporterFilterTests(
         )
 
     def test_request_meta_filtering(self):
-        request = self.rf.get("/", HTTP_SECRET_HEADER="super_secret")
+        request = self.rf.get("/", headers={"secret-header": "super_secret"})
         reporter_filter = SafeExceptionReporterFilter()
         self.assertEqual(
             reporter_filter.get_safe_request_meta(request)["HTTP_SECRET_HEADER"],
@@ -1795,12 +1797,13 @@ class ExceptionReporterFilterTests(
         )
 
     def test_exception_report_uses_meta_filtering(self):
-        response = self.client.get("/raises500/", HTTP_SECRET_HEADER="super_secret")
+        response = self.client.get(
+            "/raises500/", headers={"secret-header": "super_secret"}
+        )
         self.assertNotIn(b"super_secret", response.content)
         response = self.client.get(
             "/raises500/",
-            HTTP_SECRET_HEADER="super_secret",
+            headers={"secret-header": "super_secret", "accept": "application/json"},
-            HTTP_ACCEPT="application/json",
         )
         self.assertNotIn(b"super_secret", response.content)
 
@@ -1863,7 +1866,7 @@ class NonHTMLResponseExceptionReporterFilter(
     Refs #14614.
     """
 
-    rf = RequestFactory(HTTP_ACCEPT="application/json")
+    rf = RequestFactory(headers={"accept": "application/json"})
 
     def test_non_sensitive_request(self):
         """
@@ -1915,7 +1918,9 @@ class NonHTMLResponseExceptionReporterFilter(
 
     @override_settings(DEBUG=True, ROOT_URLCONF="view_tests.urls")
     def test_non_html_response_encoding(self):
-        response = self.client.get("/raises500/", HTTP_ACCEPT="application/json")
+        response = self.client.get(
+            "/raises500/", headers={"accept": "application/json"}
+        )
         self.assertEqual(response.headers["Content-Type"], "text/plain; charset=utf-8")
 
 

tests/view_tests/tests/test_i18n.py

@@ -38,7 +38,7 @@ class SetLanguageTests(TestCase):
         lang_code = self._get_inactive_language_code()
         post_data = {"language": lang_code, "next": "/"}
         response = self.client.post(
-            "/i18n/setlang/", post_data, HTTP_REFERER="/i_should_not_be_used/"
+            "/i18n/setlang/", post_data, headers={"referer": "/i_should_not_be_used/"}
         )
         self.assertRedirects(response, "/")
         # The language is set in a cookie.
@@ -80,7 +80,7 @@ class SetLanguageTests(TestCase):
         )
         # Insecure URL in HTTP referer.
         response = self.client.post(
-            "/i18n/setlang/", secure=True, HTTP_REFERER=non_https_next_url
+            "/i18n/setlang/", secure=True, headers={"referer": non_https_next_url}
         )
         self.assertEqual(response.url, "/")
         self.assertEqual(
@@ -94,7 +94,9 @@ class SetLanguageTests(TestCase):
         """
         lang_code = self._get_inactive_language_code()
         post_data = {"language": lang_code}
-        response = self.client.post("/i18n/setlang/", post_data, HTTP_REFERER="/i18n/")
+        response = self.client.post(
+            "/i18n/setlang/", post_data, headers={"referer": "/i18n/"}
+        )
         self.assertRedirects(response, "/i18n/", fetch_redirect_response=False)
         self.assertEqual(
             self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, lang_code
@@ -121,7 +123,7 @@ class SetLanguageTests(TestCase):
         lang_code = self._get_inactive_language_code()
         post_data = {"language": lang_code, "next": "/"}
         response = self.client.post(
-            "/i18n/setlang/", post_data, HTTP_ACCEPT="application/json"
+            "/i18n/setlang/", post_data, headers={"accept": "application/json"}
         )
         self.assertRedirects(response, "/")
         self.assertEqual(
@@ -150,7 +152,7 @@ class SetLanguageTests(TestCase):
         lang_code = self._get_inactive_language_code()
         post_data = {"language": lang_code}
         response = self.client.post(
-            "/i18n/setlang/", post_data, HTTP_ACCEPT="application/json"
+            "/i18n/setlang/", post_data, headers={"accept": "application/json"}
         )
         self.assertEqual(response.status_code, 204)
         self.assertEqual(
@@ -165,7 +167,7 @@ class SetLanguageTests(TestCase):
         lang_code = self._get_inactive_language_code()
         post_data = {"language": lang_code, "next": "//unsafe/redirection/"}
         response = self.client.post(
-            "/i18n/setlang/", post_data, HTTP_ACCEPT="application/json"
+            "/i18n/setlang/", post_data, headers={"accept": "application/json"}
         )
         self.assertEqual(response.url, "/")
         self.assertEqual(
@@ -213,7 +215,7 @@ class SetLanguageTests(TestCase):
         # %C3%A4 decodes to ä, %26 to &.
         encoded_url = "/test-setlang/%C3%A4/?foo=bar&baz=alpha%26omega"
         response = self.client.post(
-            "/i18n/setlang/", {"language": lang_code}, HTTP_REFERER=encoded_url
+            "/i18n/setlang/", {"language": lang_code}, headers={"referer": encoded_url}
         )
         self.assertRedirects(response, encoded_url, fetch_redirect_response=False)
         self.assertEqual(
@@ -230,7 +232,7 @@ class SetLanguageTests(TestCase):
             "/i18n/setlang/",
             data={"language": "nl"},
             follow=True,
-            HTTP_REFERER="/en/translated/",
+            headers={"referer": "/en/translated/"},
         )
         self.assertEqual(self.client.cookies[settings.LANGUAGE_COOKIE_NAME].value, "nl")
         self.assertRedirects(response, "/nl/vertaald/")
@@ -239,7 +241,7 @@ class SetLanguageTests(TestCase):
             "/i18n/setlang/",
             data={"language": "en"},
             follow=True,
-            HTTP_REFERER="/nl/vertaald/",
+            headers={"referer": "/nl/vertaald/"},
         )
         self.assertRedirects(response, "/en/translated/")
 

tests/view_tests/tests/test_static.py

@@ -63,7 +63,7 @@ class StaticTests(SimpleTestCase):
         file_name = "file.txt"
         response = self.client.get(
             "/%s/%s" % (self.prefix, file_name),
-            HTTP_IF_MODIFIED_SINCE="Thu, 1 Jan 1970 00:00:00 GMT",
+            headers={"if-modified-since": "Thu, 1 Jan 1970 00:00:00 GMT"},
         )
         response_content = b"".join(response)
         with open(path.join(media_dir, file_name), "rb") as fp:
@@ -73,9 +73,11 @@ class StaticTests(SimpleTestCase):
         file_name = "file.txt"
         response = self.client.get(
             "/%s/%s" % (self.prefix, file_name),
-            HTTP_IF_MODIFIED_SINCE="Mon, 18 Jan 2038 05:14:07 GMT"
+            headers={
-            # This is 24h before max Unix time. Remember to fix Django and
+                # This is 24h before max Unix time. Remember to fix Django and
-            # update this test well before 2038 :)
+                # update this test well before 2038 :)
+                "if-modified-since": "Mon, 18 Jan 2038 05:14:07 GMT"
+            },
         )
         self.assertIsInstance(response, HttpResponseNotModified)
 
@@ -88,7 +90,8 @@ class StaticTests(SimpleTestCase):
         file_name = "file.txt"
         invalid_date = "Mon, 28 May 999999999999 28:25:26 GMT"
         response = self.client.get(
-            "/%s/%s" % (self.prefix, file_name), HTTP_IF_MODIFIED_SINCE=invalid_date
+            "/%s/%s" % (self.prefix, file_name),
+            headers={"if-modified-since": invalid_date},
         )
         response_content = b"".join(response)
         with open(path.join(media_dir, file_name), "rb") as fp:
@@ -104,7 +107,8 @@ class StaticTests(SimpleTestCase):
         file_name = "file.txt"
         invalid_date = ": 1291108438, Wed, 20 Oct 2010 14:05:00 GMT"
         response = self.client.get(
-            "/%s/%s" % (self.prefix, file_name), HTTP_IF_MODIFIED_SINCE=invalid_date
+            "/%s/%s" % (self.prefix, file_name),
+            headers={"if-modified-since": invalid_date},
         )
         response_content = b"".join(response)
         with open(path.join(media_dir, file_name), "rb") as fp: